A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
The octopus does not have a blind spot.
273
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109